Shedding mechanism for looms



Sept. 16, 1930.

J. c. BROOKS 1,776,102

SHEDDING MECHANISM FOR LOOIS Filed Aug. 10, '1928 2 Shoots-Sheet 1 -1nvenTor.

Uohn C. BrooKs byfmdwkm I ATTys.

Patented Sept. 16, 1930 UNITED STATES PATENT ()FFICE JOHN C. BROOKS, OF PATERSON, NEW JERSEY SHEDDING MECHANISM FOR LOOMS' Application filed August 10, 1928.

threads are controlled, these members being.

movable transversely of the warp and thus transversely relatively to the doup needles which control the doup warp threads. Such transverse movement of the ground warp threads produces the desired crossing of the doupand ground warp threads and the construction is such that the ground warp threads may be shifted laterally in groups to produce difierent patterns.

In order to give anunderstanding of the invention I have illustrated in the drawings a selected embodiment thereof which will now be described after which the novel features will be pointed out inthe appended claims.

Fig. 1 is a fragmentary sectional view the operation of the device.

Inasmuch as the present invention relates simply to mechanism for controlling the relative positions of the doup warp threads and the ground warp threads I have not thought it necessary to illustra-teherein a complete loom but have only shown a suflicient portion thereof to enable the invention to be understood.

In the drawings 90 indicates parts of a loom frame, 91 indicate the usual lay and 92 the usual reed.

26, 29 and 31 indicate the warp threads, the threads 26, 29 being ground warp threads Fig. 4 is a diagrammatic view showing and the threads 31pbeing,the doup. warp Serial no. 298,685.

threads. The doup warp threads pass through the eyes of the doup needles 34 as usual in looms of this type and said needles are carried by the usual reed 28 which is provided with dents through which the ground warp threads 26, 29 pass.

In accordance with my present lnvention the relative lateral shifting of the ground Warp threads and the doup warp threads is accomplished by giving av lateral movement to the ground warp threads thereby to provide the required crossing of the ground warp threads withthe doup warp threads.

For securing this lateral movement of the ground warp threads I provide laterally? moving warp, thread guides having eyes or openings through which the ground warp threads pass, the lateral movement of these guides serving to give the desired lateral shifting movement to the ground warp threads. The individual ground warp thread guidesjare carried by a beam 2 which is shown as supported onbrackets, 1 that are secured to the loom 90. This beam is shown as having grooves 3 and 7 and located in the groove 3 is a rail 1' havinguprights 5 on which are secured a warp-guiding member 6 provided with a plurality of apertures 30 through whichthe ground warp threads 29 pass.

.Operating in the groove 7 is another warp guiding member which is sectional in form, it being made up of a plurality of independently movable sections. There are three such sections shown in the illustrated embodiment of the invention. These are in the form of three rails 8, 9 and 10 respectively and each The warp guide sections 11, 12 and 13 are all situated in the same plane and each-controls the ground warp threads in a zone which is different from the zone containlng the ground warp threads controlled .by another sect-ion. 1 In other words, the sections 11 and 13-contr0l the ground warp threads 1n outer zones extending longitudinally of the warp which pass through the apertures 27 of the guides 11, 12 and 13 will pass under the guide 6. These guides areshiftable longitudinally of the beam 2 or transversely of the warp, such shifting movement operating to produce a crossing of certain of the ground I warp threads with the doup warp threads.

Any suitable means for producing the latera-l movement of the rails 4, 8, 9 and 10 may beam 2. Eachrail or rail section is acted on the loom frame.

be employed. As herein shown each rail is provided with a laterally-extending arm to which is connected a cord leading to some suitable operating mechanism. For instance, the rail 4 has a laterally-extending arm 15 to which is connected the cord 21 passing over a pulley 25 secured to the beam 2 and leading to any well known operating mechanism, such as a treadle operated by a cam or a hook in a dobby or jack. The rail sections 8, 9 and 10 are also provided with laterallyextending arms or projections 14, 16 and 17 and to each projection is secured a cord passing over a direction pulley and extending to a cam-operated treadle or to the hook of a dobby or j ack; These cords are indicated at 18, 19 and 20 respectively and the pulleys over which they pass are indicated at 22, 23 and 24, said pulleys being carried by the by a return spring 89 which normally returns it to its initial position. With this construction it will be seen that any one or more of the rails or rail sections may be shifted transversely of the warp, each rail or rail section being shiftable independently of other rails.

The doup reed 28 is given a vertical movement only, the lateral movement of the warp threads to provide the desired crossing being secured by the warp guides as above described. The doup reed 28 is shown as connected by a link 37 to an arm 35 fast on a rock shaft 36 which is pivotally mounted in This rock shaft has fast thereon another arm 38 which is connected by reed.

a link 39 to a crank 40 on a crank shaft 41 of the'loom. The rotation of the crank shaft will thus give vertical movement to the doup The warp guides 11 and 13 are shown as situated at a higher level than the warp guide 12 and the inner end ofeach of the warp guides 11 and 13 projects somewhat beyond its supporting rail. This permits the warp guide12 to be shifted relatively to the warp guide 11 for instance so as to bring the end.

eye 27 of the guide 12 substantially under the end eye of the guide 11. Similarly, this construction permits the right hand end eye 27 of the guide 12 to be brought underneath the left hand eye of the guide 13.

In the operation of the device one or more of the warp guides will be shifted laterally when the doup reed is raised as shown in Fig. 1 thus causing the ground warp threads which are controlled by the shifted guides to cross the doup warp threads. The raising and lowering of the doup reed carries the doup warp threads 31 into the upper half of the shed and then into the lower half of the shed as usual in leno weaving.

As shown in Fig. 4 the ground warp guide 12 has been moved to the right. The ground warp threads 26 which are controlled by this guide are indicated by the reference letter a, the reference letter I) being used to indicate the adjacent ground warp threads 29. If, for instance, the warp guide 12 is moved to the right as shown in Fig. 4 this will carry the ground warp threads 26 marked a to the right hand side of the doup needles so that when the doup reed is lowered the'needleswill pass down on the left hand side of the ground warp threads marked a thus securing a cross- 7 ing of the doup threads with the ground warp threadscontrolled by the guide '12. A simi lar crossing of the doup warp threads with the ground warp threads controlled by any of the guides may be secured byshifting the position of the guide and by having the plurality of guides as above described the ground" warp threads maybe shifted in' groups thus producing patterns of a wide variety. I

The doup warp threads are preferably contained on a beam separate from the ground warp threads. The doup warp threads pass warp threads pass, of a sectional warp-guid A ing member for the ground warp threads, each section having means to guide the ground warp threads that are located .in a zone extending longitudinallyof the warp which is separate from that containing threads guided by another section, and means to move the sections transversely of the warp independently.

2. In a loom, the combination with a doup reed having doup needles through which doup warps pass, of a sectional warp guide for the ground warp threads, the sections of said guide being located in the same plane, and means to shift the sections independently transversely of the warp.v T

guides 6,

3. In a loom, the combination with a doup reed having doup needles through which doup warps pass, of a sectional warp guide for the group warp threads, each section controlling warp threads in a zone different from those controlled by any other section, the warp-guiding portion of certain of said sections being out of line vertically with the warp-guiding portions of other sections, and means to move the sections transversely.

i. In a loom, the combination with a doup reed having doup needles through which doup warps pass, of a warp-guiding member for the ground warps extending from one edge to the other of the warp, another warpguiding member comprising separate sections, means for shifting the sections of the warp guides independently in a transverse direction, and means operative to shift the first-named warp guides transversely.

JOHN c. BROOKS. 

